We've been doing graphics rendering using Maxwell Render on a Ubuntu box with a 6 core AMD Phenom II Processor. Ubuntu handles all 6 cores brilliantly, but a 4 core laptop is almost as fast. We'd like to upgrade and create a 64 core rackmount using:

Can anyone confirm or deny (with documentation, not opinion) whether Ubuntu (or Ubuntu Server) out of the box will recognize and handle all 64 cores? (e.g. is there an upper limit to how many cores Ubuntu can handle out-of-the-box?)

1 Answer
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Basically, this comes down to "can the Linux kernel handle this many cores". The actual number of cores supported is defined by a numerical option that can be set at kernel compile time. The kernel configuration shipped by Ubuntu can be seen here, and in that file, we find

Thank you all for the quick responses. Awesome! I'd welcome additional evidence to support the conclusion, but jstarek's answer, explanation and screenshot is VERY promising. Marco's experience with 32 cores is quite encouraging as well. Will post if/when we manage to execute. Thanks all!
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GeneJan 17 '12 at 22:21